KSQL-12936 | Fix the placement of default port number and capture the sub path while creating a client to ksqlDB.

[pbadani]

Description

Fix the placement of default port number and capture the sub path while creating a client to ksqlDB.

Testing done

Describe the testing strategy. Unit and integration tests are expected for any behavior changes.

Reviewer checklist

• Ensure docs are updated if necessary. (eg. if a user visible feature is being added or changed).
• Ensure relevant issues are linked (description should include text like "Fixes #")
• Do these changes have compatibility implications for rollback? If so, ensure that the ksql command version is bumped.

[confluent-cla-assistant]

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